Electrical connector



APPLICATION FILED NOV-19,1917- Patented July 27, 1920;

W W M.

UNITED STATES PATENT 'oFFlcE.

MAXWELL w. nonnn'rson, or BELLE HARBOR, NEW YORK, AssIeNon To GODFREY r.scrnvun'r.

ELECTRICAL CONNECTOR.

Specification of Letters Patent.

Patented July 27, 1920.

Application filed November 19, 1917. Serial No. 202,736.

To all whom it may concern:

Be it known that I, MAXWELL V. ROBERT- SON, a citizen of the UnitedStates, residing at Belle Harbor, L. 1., in the county of Queens andState of New York, have invented certain new and useful Improvements inElectrical Connectors, of which the following is a specification,reference being had therein to the accompanying drawing.

My invention relates to improvements in electrical connectors and hasparticular reference to and is illustrated in the accompanying drawingsin its application to a connector adapted for use upon the brush of anelectrical machine such as a dynamo or motor. It is of the utmostimportance in connections of this kind to provide good electricalcontact in order to insure ample conductivity for the transmission ofcurrent through the connection.

In the accompanying drawings, I have illustrated in Figure 1 inperspective, a carbon brush and double connector embodying anapplication of my invention. Fig. 2 is a similar view showing a singleconnector. Fig. 3 is a perspective view partly broken away illustratingone method of forming the end of the flexible member ot' the connector.Fig. 4 is a perspective view partly broken away illustrating theconstruction of the carbon brush, and Fig. 5 is a perspective Viewillustrating one of the parts of the connector.

6 indicates the lower part of the carbon brush which is adapted to restupon the commutator of the machine and 7 the upper part which ispreferably electroplated. One side oi the upper part is recessed toreceive the L-shaped member 8 as shown in Fig. 2, the upper part 9 ofthe L-shaped member extending over the top of the carbon brush as shown.The other side of the carbon brush is cut away as indicated at 10-10 anda hole is drilled through the brush as indicated at 11.

The end of the flexible member such as illustrated in Fig. 3 isterminated in a loop which is crushed fiat to seat within the roundrecess 10 of the brush and this loop when crushed being rectangular incross- 5 section engages all sides of said recess thereby making goodcontact therewith. After the end of the flexible member has beenintroduced, the screw 12 is pushed through and engages the tapped hole13 of the locking member 14 which thereupon presses the compressed loop15 of the flexible member shown in Fig. 3 tightly within the hole 10,and it will be observed that the offset 14: of the locking member 14Lengages the cut-away portion 10 of the carbon brush thereby extendingthe contact surfaces while at the same time preventing the lockingmember 14: from turning when. the screw 12 is turned down tight.

In the modification shown in Fig. 1, instead of forming a. loop at theend of the flexible member shown in Fig. 3, the flexible member 15 isbent in the center being crushed flat to form the loop for engagementbeneath the locking member 14.

The free ends of the flexible members are also preferably'retainedwithin clips such as 16-17, the former being for a single fleXi-' bleconnection as shown in Fig. 2 and the latter "for a double connection asshown in Fig. 1. By having the flexible member enter the clip 16-17 atright angles to the direction of the slot 18 thereof, the waist or shankof the clip is wider and stronger and the loop of the clip surroundingthe end of the terminal is naturally of greater depth, thus insuring notonly better electrical connection but increased mechanical strength.

By constructing connections in the manner aforesaid, it has been foundby actual test that the electric conductivity is increased materially.The offset 9 of the angle plate 8 also provides bearing surface andprevents wear upon the top of the carbon brush 7.

Of course it will be understood thatvarious modifications may be made inthe construction and arrangement of parts without departing from thespirit of the invention as claimed.

I claim: a

In combination with the brush of a dynamic electric machine, a flexibleconnection having a loop at one end, a recess in one side said binderfor drawing said clip, brush, and 10 of said brush Within which saidloop is flexible connection together.

seated, a screw passing through said loop In testimony whereof Ihereunto afiix my and said brush, a recess at the opposite sidesignature in the presence of two Witnesses.

of said brush and an L-shaped contact clip M AX7ELL V. ROBERTSON adaptedto engage said last mentioned recess and extend over the top of saidbrush, Witnesses:

a binder adapted to fit over said loop Within ANNA F. DUFFY, saidrecess, said screw adapted to engage THOMAS A. HILL.

